Received date: 2015-05-18
Revised date: 2015-07-06
Online published: 2015-08-10
High shale gas flow of 20.3×104m3 was tested in Longmaxi Formation in Nov.28,2012,which declared the discovery of Fuling shale gas field.On July 10,2014 the proved geological reserves of the first shale gas field in China was submitted to National Reserves Committee.The practices of exploration and development prove that the reservoirs in Fuling shale gas field belong to quality shales deposited in deep shelf,with great thickness,stable distribution,no interlayers.The shale gas field is characterized by high production well,high pressure reservoirs,good ingredients of gas and good effects on testing production,belonging to mid-deep quality natural gas reservoirs with high pressure.According to the comprehensive studies on regional sedimentary background,lithology,micro-pore structures,geophysical properties,gas sources,features of gas reservoirs,logging responding features and producing features of gas wells,it shows that(1)Longmaxi Formation in Fuling shale gas field belongs to deep shelf environment where organic-rich shales developed well;(2)Thermal evolution of shales of Longmaxi Formation is moderate and Nanometer-level pores develop;(3)The shale gas sources came from kerogens of Longmaxi Formation itself;(4)The shale gas reservoirs of Fuling Longmaxi Formation is similar to the typical ones in north America in geological features and producing rules.So all above proves that the shale gas produced from Longmaxi Formation in Fuling is the typical in-situ detained,self-generated and self-stored shale gas.
LIU Ruo-bing . Typical Features of the First Giant Shale Gas Field in China[J]. Natural Gas Geoscience, 2015 , 26(8) : 1488 -1498 . DOI: 10.11764/j.issn.1672-1926.2015.08.1488
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